I've used 2 mm perl Miyuki Rocailles and 2,6 mm Czech seedbeads in transparent sea-green. This difference in bead size sets off the swirl-pattern nicely.
The bead-crochet rope is approx. 78 cm long and holds a wooden doughnut. The pearl-shade of the necklace is repeated in the netting holding the doughnut and the centre glass-bead with embedded foil is a perfect match to the sea-green swirl of the rope.
The matt gold from the netting is repeated in the matt-gold magnet clasp.
I would recommend the necklace for a neck-circumference not more than 45 cm.